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| Tyrannosaurus Rex - Hunter or Scavenger? | |
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| Tweet Topic Started: Jul 15 2012, 10:00 AM (12,434 Views) | |
| DinosaurMichael | Jul 15 2012, 10:00 AM Post #1 |
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Apex Predator
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So I just finished watching Valley of the T-Rex and though I accept Jack Horner's opinion about T-Rex being just a scavenger. I still think T-Rex was both a Predator and a Scavenger. So what do you guys think T-Rex is in your opinion. A Hunter, Scavenger or Both? Edited by DinosaurMichael, Jul 16 2012, 12:59 AM.
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| 7Alx | Aug 5 2013, 03:56 AM Post #121 |
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Herbivore
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So based on that 95 % carnivores are opportunistic animals, because they hunt and scavenge. |
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| Ausar | Aug 5 2013, 04:45 AM Post #122 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Yes, did you have a point? Edited by Ausar, Sep 25 2014, 10:30 AM.
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| thesporerex | Aug 15 2013, 04:24 AM Post #123 |
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Kleptoparasite
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this is a stupid question aswell, its impossible for a large carnivore like t-rex to walk around and hope for some animal to lay down and die to support a 7-9 ton animals metabolism. all animals are scavengers and hunters there are no animals that 100% scavenge and no animals that 100% hunt. |
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| Megalosauroid | Nov 27 2013, 11:12 AM Post #124 |
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Autotrophic Organism
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T.rex was probably hunting about 70-80% of the food it consumed, similar to what hyenas do today. It was perfectly adapted to do so, it was way faster (at least in average) than every giant similar sized 11-12 m Carnosaur or Meat eating dinosaur known to date, due to its proportionally longer metatarsals, highly developed arctometatarsus and relatively large caudofemoralis muscle. It had neck/jaw attachments with extremely powerful and useful muscles to hunt, also the skull was perfectly adapted to resist bending and dorsoventral forces applied, things that you do not need when you scavenge most of the time. |
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| 20firebird | Dec 10 2013, 07:07 AM Post #125 |
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Unicellular Organism
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Agreed with pretty much everyone; hunted most of its prey, but wouldn't pass up a free meal. I don't think anything would. |
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| Sci Fyena | Dec 10 2013, 07:59 AM Post #126 |
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Heterotrophic Organism
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I could be way off on this, but the only large carnivore I've ever heard of that *MIGHT* have been primarily a dedicated scavenger was the short-faced bear: 1. Its bone articulation was poorly suited to chasing down prey, but well-suited to running at a moderate pace for long distances. 2. Isotope tests suggest that it ate almost only meat, and ate a variety of species like horses that would have been difficult for it to catch itself. 3. It was large, and could intimidate smaller carnivores from their kills. If these findings are correct, then let's compare them with Tyrannosaurus. 1. Tyrannosaurus could almost certainly keep up with the large armored herbivores it ate. It probably wasn't built to sprint marathons, though, due to its massive bulk and energy requirements, as might be expected of an animal that spent its time tracking carcasses. 2. All the fossils I've ever heard of associated with Tyrannosaurus-related pathologies are from large herbivores like ceratopsians and ornithischians, which could well have been run down by a hungry Tyrannosaurus. It was equipped to dispatch the prey items it ate while they were alive. 3. Tyrannosaurus would have just eaten the smaller carnivores. So, if you will forgive my tangent, I think that Tyrannosaurus does not meet the criteria for a dedicated scavenger, and was probably like the overwhelming majority of large carnivores: a capable predator that wasn't above the occasional helping of fast food. |
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| The supersaurus | Oct 25 2015, 05:43 AM Post #127 |
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Heterotrophic Organism
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i just don't get why this started, just because it was very robust dos not mean it was a scavenger!!!!! THIS also leads to Spino fanboys saying" Spino wins because T rex was a scavenger" Man....... |
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| Grimace | Oct 25 2015, 06:39 AM Post #128 |
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Kleptoparasite
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There are a -ton- of animals that 100% only scavenge or 100% hunt. Not every animal is a mammal. |
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| Ausar | Oct 25 2015, 08:12 AM Post #129 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Any examples? I can think of no obligate predators and the only obligate scavengers I can think of are some vultures, which are only able to live such a lifestyle given how they're soarers that can cover a lot of ground, something Tyrannosaurus obviously wasn't.
Edited by Ausar, Oct 25 2015, 08:14 AM.
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| Grimace | Oct 25 2015, 08:26 AM Post #130 |
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Kleptoparasite
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Well yeah, I wasn't arguing tyrannosaurus was an obligate scavenger. There are TONS of obligate scavengers/predators. I'll list what I can think of off the top of my head, but im leaving out a ton. -TONS of predatory fish are 100% predators, and do not, or will not scavenge. -hummingbirds if they count, along with swifts and swallows and probably a bunch of other insectivorous birds -Most open water deepsea predators probably don't scavenge ever, though with the lack of food I doubt they'd pass it up -Almost all frog/toad species will not scavenge, and will only eat live prey -Tons of flying predatory insects only eat what they catch while flying -insectivorous bats - A bunch of snake/lizard species - several turtle species Thats just off the top of my head, there are TONS more Pure scavengers include -a metric ton of fly species -a ton of beetle species - a ton of invertebrate species in general, too many to even list by something as vague as families. - some vulture species Not as many things here, but there are an absolutely massive number of invertebrates that PURELY scavenge. |
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| Spartan | Oct 25 2015, 08:28 AM Post #131 |
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Kleptoparasite
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I think he meant mainly invertebrates. Edit: Too late Edited by Spartan, Oct 25 2015, 08:30 AM.
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| blaze | Oct 25 2015, 09:31 AM Post #132 |
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Carnivore
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^Yeah, the statement "there are no pure 100% predators" clearly is in the context of large animals. |
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| Grimace | Oct 25 2015, 09:49 AM Post #133 |
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Kleptoparasite
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"all animals are scavengers and hunters there are no animals that 100% scavenge and no animals that 100% hunt." how does that even remotely imply only large animals? Even if it did though, it would still be wrong seeing as the largest animals on the planet are carnivores that don't scavenge. |
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| Ausar | Oct 25 2015, 10:30 AM Post #134 |
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Xi-miqa-can! Xi-miqa-can! Xi-miqa-can!
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Maybe thesporerex never meant to get real technical and didn't really mean to account for animals like the ones you listed, trusting that we'd still get his point (or at least a variation of some sort of it)?... Yup, we're getting real technical here. A whale's acts of predation are not comparable to those of predators such as say, macrophagous theropods. Edited by Ausar, Oct 25 2015, 10:42 AM.
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| blaze | Oct 25 2015, 10:56 AM Post #135 |
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Carnivore
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@Grimace Because in the instances where I've seen scientists say that, the comparison is mostly in the context of large terrestrial predators*, like Ausar, I believe that was what thesporerex meant but clarification in the original comment would have certainly helped. *this could also apply to large marine predators... excluding baleen whales... they are technically predators but they are not a useful comparison here, a white shark or orca will be though. |
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